APA Citation

DE Bono, E. 1. (1977). The happiness purpose. London: Penguin Books.

Chicago Style Citation

DE Bono, Edward 1933-. The Happiness Purpose. London: Penguin Books, 1977.

MLA Citation

DE Bono, Edward 1933-. The Happiness Purpose. London: Penguin Books, 1977.

Warning: These citations may not always be 100% accurate.